Marshall & Ilsley Corporation: to Present at the KBW Large Cap Bank Conference

MILWAUKEE, Aug 04, 2005 — Marshall & Ilsley Corporation (M&I) will present at the KBW Large Cap Bank Conference from 8:15 to 9:00 a.m. (Central Daylight Time) on Tuesday, August 9, at Destination Kohler in Kohler, Wis.

Speaking on behalf of Marshall & Ilsley Corporation will be Dennis Kuester, Chairman and CEO, Marshall & Ilsley Corporation.

A live webcast of the presentation will be available at

Special instructions: The webcast will be audio-only, accessible using Windows Media Player or RealPlayer. Anyone participating in the webcast will be required to register. The webcast replay will be available (at the same website) within four hours of the live webcast presentation for a period of 60 days, unless there is a specific request to remove the webcast at an earlier date.

The PowerPoint presentation referenced during M&I’s presentation can be accessed on Marshall & Ilsley Corporation’s website ( ). The presentation will remain available for approximately 90 days after the conference.

Marshall & Ilsley Corporation (NYSE: MI) is a diversified financial services corporation headquartered in Milwaukee, Wis., with $43.5 billion in assets. Founded in 1847, M&I Marshall & Ilsley Bank has the largest banking presence in Wisconsin with 197 offices throughout the state. In addition, M&I has 36 locations throughout Arizona; 12 offices in metropolitan Minneapolis/St. Paul, Minn.; and, locations in Duluth, Minn.; Las Vegas, Nev.; and, Naples and Bonita Springs, Fla. M&I’s Southwest Bank affiliate has seven offices in the St. Louis area and one office in Belleville, Ill. Metavante Corporation, Marshall & Ilsley Corporation’s wholly owned technology subsidiary, provides virtually all of the technology an organization needs to offer financial services. M&I also provides trust and investment management, equipment leasing, mortgage banking, asset-based lending, financial planning, investments, and insurance services from offices throughout the country and on the Internet ( or ). M&I’s customer-based approach, internal growth, and strategic acquisitions have made M&I a nationally recognized leader in the financial services industry.